Diverter/bop system and method for a bottom supported offshore drilling rig

Patent · Mon Mar 02 23:00:00 EST 1987

OSTI ID:6746647

Roche, J R; Alexander, G G

This patent describes a system adapted for alternative use as a diverter or a blowout preventer for a bottom supported drilling rig and adapted for positioning beneath a rotary table of the drilling rig, the system comprising: a fluid flow controller having a controller housing with a lower opening and an upper opening and a vertical flow path therebetween and an outlet passage provided in its housing wall, and at least two bases. A method is described for installing a system adapted for alternative connection as a diverter or a blowout preventer for a bottom supported drilling rig positioned beneath a rotary table of the drilling rig after structural casing has been set in a borehole. The method comprises: positioning a first telescoping spool having a lower end and an upper end below the rotary table, the first spool having a first base disposed at its upper end, the first base having a port disposed in its wall; aligning a fluid flow controller having a controller housing wall outlet passage and adapted for alternative use as a diverter or a blowout preventer so that the controller is substantially vertically aligned between a bore of the rotary table above and the structural casing below; and securing the fluid flow controller beneath the drilling rig rotary table.

• Assignee: Hydril Co., Los Angeles, CA
• Patent Number(s): US 4646844
• OSTI ID: 6746647
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
42 ENGINEERING
420206 -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
423000 -- Engineering-- Marine Engineering-- (1980-)
BLOWOUT PREVENTERS
CONTROL EQUIPMENT
DESIGN
DRILLING
DRILLING RIGS
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
INSTALLATION
OFFSHORE DRILLING
OIL WELLS
OPERATION
POSITIONING
SEALS
WELL CASINGS
WELLS